A tax imposed in a school district as a result of an election under the Public School Buildings Act shall be imposed for one, two, three, four, five or six years. The local school board may direct that such levy be decreased or not made for any year if, in its judgment, the total levy is not necessary for such year and shall direct that the levy be decreased by the amount required if a decrease is required by operation of the rate limitation provisions of Section 7-37-7.1 N.M. Stat. Ann..